Short-Range Correlations and Meson Exchange Currents in Photonucleon Emission

✍ Scribed by M. Anguiano; G. Co'; A.M. Lallena; S.R. Mokhtar

• Publisher: Elsevier Science
• Year: 2002
• Tongue: English
• Weight: 331 KB
• Volume: 296
• Category: Article
• ISSN: 0003-4916
• DOI: 10.1006/aphy.2002.6228

✦ Synopsis

One-nucleon emission processes induced by photon absorption are studied by considering shortrange correlation effects. At energies above the giant resonance region the validity of the direct knockout model has been tested by comparison with continuum random phase approximation results. Nucleon re-scattering effects have been considered by using an optical potential. The role of the electromagnetic convection, magnetization, and meson exchange currents has been investigated as a function of both excitation energy and momentum transfer. The short-range correlation effects have been studied by using various correlation functions. We found that the nucleon photo-emission cross section is rather sensitive to the presence of short-range correlations at large values of nucleon emission angle. In this region, however, the effects of meson exchange currents are even larger than those produced by short-range correlations.